Rudy Moore shared these words of wisdom:

> Is there an mp3 codec that I can use with OneNote?

No.

> Will it record
> the "follow along" data that one note uses to highlight the various
> parts of the notes I was taking?

Sorry, I do not understand this.
ON recordings are made in the WMA format.
But there is no problem to convert the resulting WMA-files to the
MP3-format later (for whatever this might be good for [the compression
rate of WMA is - at least - as good as the one of MP3]).

> I'd like to be able to record lectures while I'm there, then listen
> to them again later. I'd like to be able to listen to them both in
> ON and on a portable mp3 player.

OK, fine. Where's the problem?
Just export the WMA-recordings and convert them to MP3 (using any of
the WMA-MP3 converters available for free on the net).

> As far as I can tell, none of the
> formats that ON is currently recording to is supported by the
> portable players.

Not true - at least the way you put it.
There's quite some players working fine with WMA.
And in case yours does not, convert the files to format your player
understands.

Rainald